<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>error</title>
</head>
<body>

<center>
    <span style="color: red; font-size: 300px">404</span>
    <br/>
    <a href="/jiudian"><button>返回登录</button></a>
</center>

</body>
</html>